The Wacker Neuson Water Temperature Switch is a genuine OEM component designed for the BL744ch, BL744h, BL742h, BL744c, BL744 EX, and BL742 EX Backhoe Loader series. As a direct OEM replacement sourced through Wacker Neuson's authorized parts program, this switch is built to the same specification as the original unit installed at the factory. Correct fitment across the BL744 and BL742 series is confirmed, making the right choice when an exact match matters. Install with confidence knowing this part carries the same electrical and thermal characteristics as the component it replaces.
Key Features
- OEM-Spec Switching Threshold — Engineered to activate at the correct coolant temperature set point, ensuring the warning or shutdown circuit responds exactly as Wacker Neuson intended.
- Direct Plug-In Replacement — Matches the original connector, thread pitch, and housing profile for a straight swap with no adapter or re-wiring needed.
- Broad BL-Series Fitment — Confirmed compatibility across BL744ch, BL744h, BL742h, BL744c, BL744 EX, and BL742 EX Backhoe Loaders from a single part number.
- Protects the Engine from Thermal Damage — A properly functioning water temperature switch triggers alerts before coolant overheating can cause head gasket failure, warped components, or unplanned engine-down events.
- Electrical Safety Compliance — As part of the machine's temperature monitoring and protection circuit, this genuine OEM switch ensures the warning and shutdown system operates within Wacker Neuson's designed safety parameters.
- Genuine Wacker Neuson Part — Supplied under part number 5100032643, backed by Wacker Neuson's OEM quality assurance for electrical components.
The water temperature switch monitors the engine coolant temperature and sends an electrical signal to the machine's instrument cluster or control system when the temperature reaches a defined threshold. This triggers a warning to the operator or initiates a protective shutdown, preventing the engine from running under dangerous overheating conditions. When this switch fails or reads inaccurately, the machine may show false warnings, fail to alert the operator during a genuine overheat event, or prevent the engine from starting — making prompt replacement with the correct OEM part essential for safe, reliable operation.
Part Details
| Part Number | 5100032643 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Water Temperature Switch |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| BL744ch Backhoe Loader | BL744ch | 5100031800 |
| BL744h Backhoe Loader | BL744h | 5100031801 |
| BL742h Backhoe Loader | BL742h | 5100031802 |
| BL744c Backhoe Loader | BL744c EX | 5100031803 |
| BL744 EX Backhoe Loader | BL744 EX | 5100031804 |
| Backhoe Loader | BL742 EX | 5100031805 |
| Electrical | Electrical | 5100047484 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
